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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  
20  package org.apache.myfaces.orchestra.conversation.spring;
21  
22  import org.apache.myfaces.orchestra.conversation.ConversationBindingEvent;
23  import org.apache.myfaces.orchestra.conversation.ConversationBindingListener;
24  
25  /**
26   * A simple class to tidy up persistence contexts.
27   * <p>
28   * An instance of this class can be stored into the attributes of a specific
29   * Conversation object. Because it implements ConversationBindingListener, it
30   * receives a valueUnbound callback when the Conversation is terminated. It
31   * then closes the persistence context object associated with the Conversation. 
32   */
33  public class PersistenceContextCloser implements ConversationBindingListener
34  {
35      private final PersistenceContext persistenceContext;
36  
37      public PersistenceContextCloser(PersistenceContext persistenceContext)
38      {
39          this.persistenceContext = persistenceContext;
40      }
41  
42      public PersistenceContext getPersistenceContext()
43      {
44          return persistenceContext;
45      }
46  
47      public void valueBound(ConversationBindingEvent event)
48      {
49      }
50  
51      public void valueUnbound(ConversationBindingEvent event)
52      {
53          persistenceContext.close();
54      }
55  }